#define  _CRT_SECURE_NO_WARNINGS
#include <vector>
using namespace std;

class Solution {
public:
    vector<int> searchRange(vector<int>& nums, int target) {
        if (nums.empty()) return { -1, -1 };
        int left = 0, right = nums.size() - 1;
        while (left < right)
        {
            int mid = left + (right - left) / 2;
            if (nums[mid] < target)
                left = mid + 1;
            else
                right = mid;
        }
        if (nums[left] != target) return { -1, -1 };
        int ret1 = left;
        right = nums.size() - 1;
        while (left < right)
        {
            int mid = left + (right - left + 1) / 2;
            if (nums[mid] > target)
                right = mid - 1;
            else left = mid;
        }
        return { ret1, right };
    }
};